We just posted this comment over at the Ostensible Cat blog:
"We've been kind of wondering why there wasn't a collaborative megadungeon project being coordinated amongst all the OSR blogs, each one developing a specific level and bringing it all together as a shared, open source public-domain group effort. Maybe that's an idea that might be worth revisiting in 2011..."
Did something like this already occur and we missed it? If so, can someone point it out to us?
Thanks!
EDIT
What we have in mind is a cross-blog exercise along the lines of the Open World gaming that Chris over at Hill Cantons has been talking about, only starting from a slightly different angle by attempting to develop a cross-blog open world megadungeon. The current Domain-Level Playtest is an awesome and wonderful thing. This idea would dove-tail directly into that effort, kind of like how Blair's Black Ziggurat. Remember that?
A Combination resource-dump, workshop, and virtual commonplace book all rolled into one.